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<meta name="author" content="lglspace" /><meta name="description" content="批量读取自定义配置 自定义配置类 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 package cn.lglspace.stulab.config; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.context.annotation.PropertySource; import org.springframework.stereotype.Component; import lombok.Data; @Data @Component // @PropertySource(value = {&amp;#34;classpath:sys-info.properties&amp;#34;}) @ConfigurationProperties(prefix = SysInfoConfig.PREFIX, ignoreInvalidFields = true) public class SysInfoConfig { public static final String PREFIX = &amp;#34;sys-info&amp;#34;; // 这里对" /><meta name="keywords" content="lglspace, blog, lgl" />






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<meta property="og:description" content="批量读取自定义配置 自定义配置类 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 package cn.lglspace.stulab.config; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.context.annotation.PropertySource; import org.springframework.stereotype.Component; import lombok.Data; @Data @Component // @PropertySource(value = {&#34;classpath:sys-info.properties&#34;}) @ConfigurationProperties(prefix = SysInfoConfig.PREFIX, ignoreInvalidFields = true) public class SysInfoConfig { public static final String PREFIX = &#34;sys-info&#34;; // 这里对" />
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<meta itemprop="description" content="批量读取自定义配置 自定义配置类 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 package cn.lglspace.stulab.config; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.context.annotation.PropertySource; import org.springframework.stereotype.Component; import lombok.Data; @Data @Component // @PropertySource(value = {&#34;classpath:sys-info.properties&#34;}) @ConfigurationProperties(prefix = SysInfoConfig.PREFIX, ignoreInvalidFields = true) public class SysInfoConfig { public static final String PREFIX = &#34;sys-info&#34;; // 这里对">
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<meta name="twitter:description" content="批量读取自定义配置 自定义配置类 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 package cn.lglspace.stulab.config; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.context.annotation.PropertySource; import org.springframework.stereotype.Component; import lombok.Data; @Data @Component // @PropertySource(value = {&#34;classpath:sys-info.properties&#34;}) @ConfigurationProperties(prefix = SysInfoConfig.PREFIX, ignoreInvalidFields = true) public class SysInfoConfig { public static final String PREFIX = &#34;sys-info&#34;; // 这里对"/>

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      <h1 class="post-title">SpringBoot应用中自定义参数配置</h1>

      <div class="post-meta">
        <span class="post-time"> 2020-11-04 </span>
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            <a href="/categories/java/"> java </a>
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    <li>
      <ul>
        <li><a href="#批量读取自定义配置">批量读取自定义配置</a>
          <ul>
            <li><a href="#自定义配置类">自定义配置类</a></li>
            <li><a href="#启动类">启动类</a></li>
            <li><a href="#applicationyml">application.yml</a></li>
            <li><a href="#引用类">引用类</a></li>
            <li><a href="#总结">总结</a></li>
          </ul>
        </li>
        <li><a href="#通过value读取配置参数">通过@Value读取配置参数</a></li>
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    <div class="post-content">
      <h2 id="批量读取自定义配置">批量读取自定义配置</h2>
<h3 id="自定义配置类">自定义配置类</h3>
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<pre class="chroma"><code class="language-java" data-lang="java"><span class="kn">package</span> <span class="nn">cn.lglspace.stulab.config</span><span class="o">;</span>

<span class="kn">import</span> <span class="nn">org.springframework.boot.context.properties.ConfigurationProperties</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">org.springframework.context.annotation.PropertySource</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">org.springframework.stereotype.Component</span><span class="o">;</span>

<span class="kn">import</span> <span class="nn">lombok.Data</span><span class="o">;</span>

<span class="nd">@Data</span>
<span class="nd">@Component</span>
<span class="c1">// @PropertySource(value = {&#34;classpath:sys-info.properties&#34;})
</span><span class="c1"></span><span class="nd">@ConfigurationProperties</span><span class="o">(</span><span class="n">prefix</span> <span class="o">=</span> <span class="n">SysInfoConfig</span><span class="o">.</span><span class="na">PREFIX</span><span class="o">,</span> <span class="n">ignoreInvalidFields</span> <span class="o">=</span> <span class="kc">true</span><span class="o">)</span>
<span class="kd">public</span> <span class="kd">class</span> <span class="nc">SysInfoConfig</span> <span class="o">{</span>
	<span class="kd">public</span> <span class="kd">static</span> <span class="kd">final</span> <span class="n">String</span> <span class="n">PREFIX</span> <span class="o">=</span> <span class="s">&#34;sys-info&#34;</span><span class="o">;</span> <span class="c1">// 这里对应配置文件中的sysInfo前缀
</span><span class="c1"></span>    <span class="kd">private</span> <span class="n">String</span> <span class="n">welcome</span><span class="o">;</span>
    <span class="kd">private</span> <span class="n">String</span> <span class="n">author</span><span class="o">;</span>
    <span class="kd">private</span> <span class="n">String</span> <span class="n">version</span><span class="o">;</span>
<span class="o">}</span>
</code></pre></td></tr></table>
</div>
</div><h3 id="启动类">启动类</h3>
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<pre class="chroma"><code class="language-java" data-lang="java"><span class="kn">package</span> <span class="nn">cn.lglspace.stulab</span><span class="o">;</span>

<span class="kn">import</span> <span class="nn">org.springframework.beans.factory.InitializingBean</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">org.springframework.boot.SpringApplication</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">org.springframework.boot.autoconfigure.SpringBootApplication</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">org.springframework.boot.context.properties.EnableConfigurationProperties</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">org.springframework.core.env.Environment</span><span class="o">;</span>

<span class="kn">import</span> <span class="nn">cn.lglspace.stulab.config.SysInfoConfig</span><span class="o">;</span>

<span class="nd">@SpringBootApplication</span>
<span class="c1">// @EnableConfigurationProperties(SysInfoConfig.class)
</span><span class="c1"></span><span class="kd">public</span> <span class="kd">class</span> <span class="nc">StulabSpringBootApplication</span> <span class="kd">implements</span> <span class="n">InitializingBean</span><span class="o">{</span>
	<span class="kd">private</span> <span class="n">Environment</span> <span class="n">env</span><span class="o">;</span>
	
	<span class="kd">public</span> <span class="nf">StulabSpringBootApplication</span><span class="o">(</span><span class="n">Environment</span> <span class="n">env</span><span class="o">){</span>
		<span class="k">this</span><span class="o">.</span><span class="na">env</span> <span class="o">=</span> <span class="n">env</span><span class="o">;</span>
	<span class="o">}</span>
	
	<span class="nd">@Override</span>
	<span class="kd">public</span> <span class="kt">void</span> <span class="nf">afterPropertiesSet</span><span class="o">()</span> <span class="kd">throws</span> <span class="n">Exception</span> <span class="o">{</span>
		<span class="c1">// 会打印出：**********:welcome to lglspace
</span><span class="c1"></span>		<span class="n">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="s">&#34;**********:&#34;</span><span class="o">+</span><span class="n">env</span><span class="o">.</span><span class="na">getProperty</span><span class="o">(</span><span class="s">&#34;sys-info.welcome&#34;</span><span class="o">));</span>
	<span class="o">}</span>
	
	<span class="kd">public</span> <span class="kd">static</span> <span class="kt">void</span> <span class="nf">main</span><span class="o">(</span><span class="n">String</span><span class="o">[]</span> <span class="n">args</span><span class="o">)</span> <span class="o">{</span>
		<span class="n">SpringApplication</span><span class="o">.</span><span class="na">run</span><span class="o">(</span><span class="n">StulabSpringBootApplication</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="n">args</span><span class="o">);</span>
	<span class="o">}</span>
<span class="o">}</span>
</code></pre></td></tr></table>
</div>
</div><h3 id="applicationyml">application.yml</h3>
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<pre class="chroma"><code class="language-yml" data-lang="yml"><span class="nt">sys-info</span><span class="p">:</span><span class="w">
</span><span class="w">  </span><span class="nt">welcome</span><span class="p">:</span><span class="w"> </span><span class="l">welcome to lglspace</span><span class="w">
</span><span class="w">  </span><span class="nt">author</span><span class="p">:</span><span class="w"> </span><span class="l">长征</span><span class="w">
</span><span class="w">  </span><span class="nt">version</span><span class="p">:</span><span class="w"> </span><span class="m">1.0.0</span><span class="w"> 
</span></code></pre></td></tr></table>
</div>
</div><h3 id="引用类">引用类</h3>
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<pre class="chroma"><code class="language-java" data-lang="java"><span class="kn">package</span> <span class="nn">cn.lglspace.stulab.web</span><span class="o">;</span>

<span class="kn">import</span> <span class="nn">org.springframework.beans.factory.annotation.Autowired</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.RequestMapping</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">org.springframework.web.bind.annotation.RestController</span><span class="o">;</span>

<span class="kn">import</span> <span class="nn">cn.lglspace.stulab.config.SysInfoConfig</span><span class="o">;</span>

<span class="nd">@RestController</span>
<span class="kd">public</span> <span class="kd">class</span> <span class="nc">HelloController</span> <span class="o">{</span>
	
	<span class="nd">@Autowired</span>
	<span class="kd">private</span> <span class="n">SysInfoConfig</span> <span class="n">sysInfoConfig</span><span class="o">;</span>

	<span class="nd">@RequestMapping</span><span class="o">(</span><span class="s">&#34;/&#34;</span><span class="o">)</span>
	<span class="kd">public</span> <span class="n">String</span> <span class="nf">index</span><span class="o">()</span> <span class="o">{</span>
		<span class="k">return</span> <span class="n">sysInfoConfig</span><span class="o">.</span><span class="na">getWelcome</span><span class="o">();</span>
	<span class="o">}</span>

<span class="o">}</span>
</code></pre></td></tr></table>
</div>
</div><h3 id="总结">总结</h3>
<ul>
<li>@PropertySource 该注解只在配置信息存于独立文件时使用，如果就配置在application.yml文件，可不配置。</li>
<li>@ConfigurationProperties中prefix，不能用驼峰写法，只能用“-”隔开</li>
<li>@EnableConfigurationProperties 该注解在当前情况下是可以省略的，就是说SysInfoConfig这个类有@Component+@ConfigurationProperties注解时，可以不加！</li>
</ul>
<h2 id="通过value读取配置参数">通过@Value读取配置参数</h2>
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<td class="lntd">
<pre class="chroma"><code class="language-java" data-lang="java"><span class="kn">package</span> <span class="nn">cn.lglspace.stulab.config</span><span class="o">;</span>

<span class="kn">import</span> <span class="nn">org.springframework.beans.factory.annotation.Value</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">org.springframework.context.annotation.PropertySource</span><span class="o">;</span>
<span class="kn">import</span> <span class="nn">org.springframework.stereotype.Component</span><span class="o">;</span>

<span class="kn">import</span> <span class="nn">lombok.Data</span><span class="o">;</span>

<span class="nd">@Data</span>
<span class="nd">@Component</span>
<span class="nd">@PropertySource</span><span class="o">(</span><span class="n">value</span> <span class="o">=</span> <span class="o">{</span><span class="s">&#34;classpath:sys-info.properties&#34;</span><span class="o">},</span><span class="n">encoding</span> <span class="o">=</span> <span class="s">&#34;utf-8&#34;</span><span class="o">)</span>
<span class="kd">public</span> <span class="kd">class</span> <span class="nc">SysInfoConfig</span> <span class="o">{</span>
	<span class="nd">@Value</span><span class="o">(</span><span class="s">&#34;${sys-info.welcome}&#34;</span><span class="o">)</span>
    <span class="kd">private</span> <span class="n">String</span> <span class="n">welcome</span><span class="o">;</span>
	<span class="nd">@Value</span><span class="o">(</span><span class="s">&#34;${sys-info.author}&#34;</span><span class="o">)</span>
    <span class="kd">private</span> <span class="n">String</span> <span class="n">author</span><span class="o">;</span>
	<span class="nd">@Value</span><span class="o">(</span><span class="s">&#34;${sys-info.version}&#34;</span><span class="o">)</span>
    <span class="kd">private</span> <span class="n">String</span> <span class="n">version</span><span class="o">;</span>
<span class="o">}</span>
</code></pre></td></tr></table>
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        2020-11-04
        
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